While designing a new wing for a radio controlled powered glider I realized I needed servo trays that were low profile and able to hold a 9g style servo without having to access the normal hold down screws that are only accessible from the top or bottom of the servo. The tray has a set of slots that capture the mounting ears of the servo and also allow the servo leads to be attached to an extension lead and pushed through the mount and out of the way. The servo tray is attached to the bottom of a flat bottom wing via a flange that goes around the entire tray. The servo is retained in the tray via a servo cover that is held on with (2) 3mm x 8mm flat socket head screws. The screws are counter sunk into the surface of the cover and provide a smooth surface.

I printed these servo trays out of PETG as one of my first times printing with this material and I am continuing to refine my settings. My only difficulty was when I removed the support material from the flange area. The opening for the servo connector was also filled with support material and on several of the trays that I printed, I cracked the flange when removing the supports in this area. Nothing a little CA won’t cure. The flange will be bonded to the skin in this area and the skin will also provide a reinforcement. The tray cover will also hide this cracked area.

The files are the Left hand and Right hand trays and Left hand and Right hand covers. The files as imported into the slicer may have to be rotated to lie flat on the print bed and I sliced in Slic3r with full supports. Slicing with another slicer may allow you to only support from the bead and let the servo lead access hole be bridged. I obtained the 3mm screws at my local Ace hardware but anyone living outside the U.S. will probably be able to obtain the screws nearly anywhere. (Unless you are living in one of the other major industrial nations still on the Imperial system like Myanmar or Liberia).